I’d like to advocate for a change to the (Mythical) Pestilence of Dreeg Amulet. I think it would be way better to change the current Poison/Acid resistances to Chaos resistance or Elemental resistance instead. If you use it with anything Occultist, you’ll probably have ridiculous Poison/acid res overcap anyway.
I suggested it some time ago too. Usually acid gear is swimming in acid/poison resistances, while lacking in others. Furthermore Occultist have nice boost from Blood of Dreeg.
I think Pestilence ammy is extremely good, and extra res might make it too good. Plus some of the dervishes actually use that acid res. I think I even used one acid res augment on Dark One conjurer, too.
However, the valid point is that sources of acid res should be looked at, if not on Pestilence then on Manticore (and the ridiculous low proc chance), Meditation, and many other acid items. ~50% acid builds have over 80% acid res overcap, and struggle with other res as well as with all kinds of defensive stats which are lacking in the acid corner of devotion map.
Pierce, cold, lightning, fire, aether - they all go their seasons of total domination. Time for acid.